linux-kernel - Re: [PATCH] crypto: lib/mpi - Fix unexpected pointer access

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Message-ID: <ZYUSZV8zHJMC444n@gondor.apana.org.au>
Date: Fri, 22 Dec 2023 12:36:53 +0800
From: Herbert Xu <herbert@...dor.apana.org.au>
To: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
Cc: "David S. Miller" <davem@...emloft.net>,
	Mimi Zohar <zohar@...ux.ibm.com>, linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] crypto: lib/mpi - Fix unexpected pointer access

On Thu, Dec 14, 2023 at 11:08:34AM +0800, Tianjia Zhang wrote:
> When the mpi_ec_ctx structure is initialized, some fields are not
> cleared, causing a crash when referencing the field when the
> structure was released. Initially, this issue was ignored because
> memory for mpi_ec_ctx is allocated with the __GFP_ZERO flag.
> For example, this error will be triggered when calculating the
> Za value for SM2 separately.
> 
> Fixes: d58bb7e55a8a ("lib/mpi: Introduce ec implementation to MPI library")
> Cc: stable@...r.kernel.org # v6.5
> Signed-off-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
> ---
>  lib/crypto/mpi/ec.c | 3 +++
>  1 file changed, 3 insertions(+)

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt